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morpeh [17]
3 years ago
6

The probability that you will get grounded if you have a bad grade is 85%. The probability that you will get grounded and have e

xtra chores is 50%. What is the probability that you will have extra chores given that you are already grounded?
Mathematics
2 answers:
inna [77]3 years ago
6 0
Is the answer 25? I'd like to buy a vowel for 50 please?
Sonbull [250]3 years ago
3 0
0.85 x 0.5 = 0.425. 

If it's an 85% chance of getting grounded then it's a 0.85 chance. On top of that, getting extra chores if 50% or 0.50 so multiply them together to get a probability of 0.425 or 42.5%.
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In the figure shown, what is the measure of angle x?
mojhsa [17]
Angles in a triangle must add up to 180, so the missing angle inside the triangle is 180 - (70 + 40), which is 70.

Angles on a straight line (i.e. the line BD) must add up to 180, and because we know part of that angle is 70, x must be 180 - 70, which is 110.

Hence, x is 110 degrees.
5 0
2 years ago
Read 2 more answers
1.)Find the height of a rectangular prism if the surface area is 148 cm2, the width is 4 cm and the length is 5 cm.
Contact [7]
1) surface of a rectangular prism=2(length x width)+2(length x height)+2(width x height)

Therefore:
148 cm²=2(5 cm x 4 cm)+2(5 cm x h)+2(4 cm x h)=
148 cm²=40 cm²+10 cm h+8 cm h
18 cm h=148 cm²-40 cm²
18 cm h=108 cm²
h=108 cm² / 18 cm=6 cm.

answer: height=6 cm 

2)
Volume of a rectangular prism= length x width x height 
therefore:
34 cm³=(1.7 cm)(0.5 cm) h
0.85 cm² h=34 cm³
h=34 cm³/0.85 cm²
h=40 cm.

answer: height=40 cm

3)
volume of a cylinder: πr²h
therefore.
118.79 ft³=πr²(5 ft)
r=√(118.79 ft³/5π ft)≈2.75 ft

answer: radius=2.75 ft

4)
 
Surface area of the pyramid with square base=4(A side)+A base
A side=(1/2)(8ft)(12 ft)=48 ft²
A base=(8 ft)(8 ft)=64 ft²

surface area=4(48 ft²)+64 ft²=256 ft²

Answer: the surface area of this pyramid would be 256 ft².

5)
surface of a cone=πrs+πr²
therefore:
radius=diameter/2=6.2 ft/2=3.1 ft
63.3 ft²=π(3.1 ft) s+π(3.1 ft)²
3.1π ft s=33.109 ft²
s=33.109 ft² /3.1π ft
s≈3.4 ft

Answer: the slant height would be 3.4 ft.

6)
volume of a square pyramid=(area of base x heigth)/3
therefore:
area of base=(6 ft)(6 ft)=36 ft²
126.97 ft³=36 ft² h /3
h=126.97 ft³/12 ft²=10.58 ft

answer: the height would be 10.58 ft.

7)
volume of a cone =(base x height)/3
base of a cone=πr²
therefore: 
199.23 cm³=πr²(9 cm)/3
r=√(199.23 cm³ / 3π cm)≈4.6 cm

answer: the radius would be 4.6 cm.

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2 years ago
Which of the following would be an acceptable first step in simplifying the expression
krek1111 [17]

Answer: A

Step-by-step explanation: Because it can be simplified twice.

7 0
1 year ago
X^2-6x=6<br> solve by completing the square
Ivanshal [37]
Hi!

The answer is x=3± \sqrt{15}
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3 years ago
Which category do all of these shapes belong to
Nataly [62]

Answer:

squares

Step-by-step explanation:

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